WO2016079226A1 - "flexible-rigid" air pipe - Google Patents

"flexible-rigid" air pipe Download PDF

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Publication number
WO2016079226A1
WO2016079226A1 PCT/EP2015/077064 EP2015077064W WO2016079226A1 WO 2016079226 A1 WO2016079226 A1 WO 2016079226A1 EP 2015077064 W EP2015077064 W EP 2015077064W WO 2016079226 A1 WO2016079226 A1 WO 2016079226A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
conduit
wall
composite material
sections
Prior art date
Application number
PCT/EP2015/077064
Other languages
French (fr)
Inventor
Benoît DANTIN
Original Assignee
Airbus Group Sas
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Airbus Group Sas filed Critical Airbus Group Sas
Priority to CN201580071731.8A priority Critical patent/CN107208829B/en
Priority to US15/528,185 priority patent/US10203051B2/en
Priority to EP15798038.4A priority patent/EP3221624B1/en
Publication of WO2016079226A1 publication Critical patent/WO2016079226A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/10—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements not embedded in the wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/02—Hoses, i.e. flexible pipes made of fibres or threads, e.g. of textile which may or may not be impregnated, or provided with an impermeable layer, e.g. fire-hoses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/18—Articulated hoses, e.g. composed of a series of rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0218—Flexible soft ducts, e.g. ducts made of permeable textiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0254—Ducting arrangements characterised by their mounting means, e.g. supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
    • B29K2309/08—Glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/005—Hoses, i.e. flexible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/40—Weight reduction

Definitions

  • the invention relates to the general field of air conditioning in aircraft and relates more particularly to the placement on the aircraft structure of the pipes for the circulation of air.
  • the invention also relates to the problems of placing on the structure of an aircraft the different strands constituting the electrical wiring.
  • the circulation of air in aircraft is generally performed by rigid pipes made of fiberglass and phenolic resin composite, connected together by connecting sleeves.
  • the electrical interconnection between equipments is, for its part, currently carried out by means of electric cables.
  • These cables allow for example the transmission of high intensity currents, functional currents of lower intensity, or electrical communication signals, as well as the grounding of the various equipment.
  • These cables are also attached to the structure via supports fixed on structural elements (primary structure, cladding ).
  • the establishment of the interconnection is also generally carried out using pre-made cable strands, of determined dimensions, hardly reconfigurable.
  • the spacing of the supports means that the electrical connections forming the interconnection offer laxity to the wiring, so that a segregation distance between two neighboring links is imposed by the installation rules of the systems so that two adjacent electrical connections can not come into contact with each other because of the laxity of these links between two fasteners.
  • An object of the invention is to provide a simple and effective solution to the problem described above.
  • the conduit according to the invention comprises a flexible tube of composite material whose matrix is a resin which remains flexible after polymerization.
  • Said tube has sections along its length for which the wall of the tube is stiffened by means of structural elements made of a composite material whose matrix is a resin which stiffens after polymerization.
  • Said structural elements are configured and arranged to the surface of the tube so as to form a lattice framework surrounding the wall of the tube.
  • the matrix forming the composite material constituting the tube is a polyurethane resin or a silicone resin.
  • the matrix forming the composite material constituting the structural elements is an acrylic resin.
  • the lattice framework of rigid composite material constituting the rigid sections of the duct is formed of rings connected to each other by longitudinal members arranged all around the wall of the tube.
  • the duct according to the invention further comprises ring-shaped structural elements of rigid composite material disposed at the ends of the duct.
  • the lattice framework and the structural elements of the ends are integrated into the wall of the flexible tube before polymerization of the resins constituting the flexible tube and the elements forming the framework.
  • the reinforcing elements are integrated in the pipe before polymerization of the resins.
  • the conduit according to the invention further comprises electrical conductors arranged longitudinally on the wall of the conduit, said electrical conductors having a rectilinear path at the level of the rigidified sections of the conduit and a path having sinuosities at some of the non-rigidified sections of the duct.
  • said electrical conductors have a path having sinuosities at non-rigidified sections of the duct located at the ends of said duct.
  • said electrical conductors are integrated in the wall of the conduit before polymerization of the resins.
  • said electrical conductors are attached to the wall of the conduit by means of an adhesive.
  • the possibility of producing in one piece pipes of great lengths that can carry electrical connections advantageously makes it possible to make electrical connections of great lengths having a minimum of connection zones. These zones are likely to penalize the functional behavior of the electrical systems by adding contact resistances and decrease the reliability of the link as a whole.
  • FIG. 1 a schematic overall view showing the structure of a conduit according to the invention
  • FIG. 2 a schematic overall view of a conduit according to the invention equipped with conductive elements
  • FIG. 3 a partial schematic view of the conduit according to the invention shown in Figure 3;
  • FIG. 4 a partial schematic view of the duct according to the invention shown in Figure 3, the end of the duct element being folded;
  • FIG. 5 a partial schematic view of a conduit 10a according to the invention shown in Figure 3, said end being connected to another conduit 10b.
  • the device according to the invention consists mainly of a duct 10, an air conditioning duct intended to being housed in an aircraft structure for example, having an alternation of rigid duct sections 1 1 separated from each other by flexible duct sections 12.
  • the respective lengths of the rigid sections 1 1 and flexible 12 essentially depend on the use of the conduit and the conditions of installation of this conduit.
  • this "flex-rigid" structure is obtained by producing a composite material duct formed of a reinforcement fabric impregnated with a resin having the property of remaining flexible after polymerization.
  • the resin used is a polyurethane resin.
  • the flexible duct 10 thus obtained is, moreover, stiffened on certain sections by structural elements 13, each element consisting of rings 131a and 131b made of composite materials with a rigid matrix, arranged along the duct 10 and connected to one another by means of longitudinal members 132, made of rigid matrix composite material as well, and arranged all around the wall of the duct 10, preferably evenly.
  • the assembly constituted by the rings 131a and 131b connected to each other by longitudinal members 132 forms a frame 13 having the appearance of a frame or a lattice surrounding certain sections of the duct 10, the central part in particular, and making these sections incapable of bending.
  • the conduit 10 according to the invention may thus consist of a succession of rigid parts 13 and flexible parts 12 such as those illustrated in FIG.
  • the duct 10 thus obtained is also stiffened at its ends by end elements 14, 15 in the form of rings made of rigid matrix composite material, similar to the rings 131a and 131b constituting the rigid structure 13. These rings, widths determined, have the function of facilitating the connection of two ducts, allowing for example to easily insert a rigid connecting tube 31 at the end of each of the ducts as shown in Figure 3.
  • an end ring may be placed at the end of a section of duct 10 that is kept flexible, as illustrated in FIGS. 1 to 3, or constitute the ring. end 131b of a rigid section.
  • the duct 10 may also comprise intermediate structures 14 and 15 in the form of rings made of rigid matrix composite material, similar to the rings 131a and 131b constituting the rigid structure 13 but without a rigid connection between them or with the latter. These rigid intermediate rings 14 and 15 may in particular facilitate the connection between two ducts having flexible endings of duct sections held flexible.
  • the structure duct "Flex-rigid" according to the invention can be made of composite material in various ways known and not shown here.
  • the conduit 10 according to the invention is made in a single operation which consists in forming a tube from a fiberglass fabric impregnated with an elastic resin and constituting the rigid framework. on the outer wall of the tube thus formed by applying to the outer surface of the tube strips of fabric impregnated with a rigid matrix, the impregnated fabric strips being arranged to form the rings 131a and 131b and the longitudinal members 132 forming an element frame 13 or the end rings 14 and 15 of the conduit.
  • the assembly thus formed is then polymerized in a single operation, so that the resulting conduit 10 forms a monolithic object, that is to say without added element after manufacture, by gluing or any other known technique.
  • the epoxy resin used to form the framework elements 13 is chosen so that its polymerization occurs under the same conditions as those of the polyurethane used to produce the conduit 10.
  • this "flex-rigid" structure makes it possible to have a single duct which has rigid rectilinear sections 1 1 and flexible sections 12, capable of deforming without damage, making it possible to make a piece of ducts 10 of great length (several meters) easy to set up inside the structure for which it is intended.
  • the rigid parts 1 1 allow easy handling of the conduit 10 considered, the installation of said conduit on the structure and the easy connection of different ducts forming a pipe.
  • the elbows are thus made without requiring the interruption of the conduit or the introduction of a rigid element bent. It is thus possible to achieve, with a minimum of junctions 31, long length pipes having both rectilinear portions and bent portions.
  • the duct 10 according to the invention may be equipped with electrical conductors 21 (cables, braids, etc.) arranged so as to run longitudinally along the duct 10. this effect, said conductors 21 can be directly bonded to the surface of the conduit 10 after manufacture of the latter.
  • the conductors 21 are preferably arranged to pass on the longitudinal members 132 constituting each frames 13 forming the rigid sections 1 1 of the duct 10.
  • the conductors 21 are arranged on the conduit 10 so as not to hinder the deformation capacity available to the conduit 10 at the level of the sections 12 held flexible.
  • they adopt in these zones a corrugated course 22, as illustrated in FIGS. 2 and 3.
  • This corrugated course advantageously makes it possible to deform the rectilinear profile of the duct 10 at the level of the flexible sections 12, as illustrated by FIGS. and 5, without the conductors 21 breaking or tearing from the surface of the duct 10 thereby damaging the wall of the latter. It is thus possible to advantageously connect two ducts 10a and 10b oriented in different directions, as illustrated in FIG. 5, by means of a simple rectilinear connection sleeve 31.

Abstract

The invention relates to a pipe for forming air flow pipelines in a structure that comprises a flexible tube (10) made from composite material, said tube having, on the length of same, sections (11) for which the wall of the tube (10) is stiffened by means of structural elements (13) made from a rigid composite material incorporated into the wall of the tube (10). Said structural elements are configured and arranged at the surface of the tube in such a way as to form a lattice framework surrounding the wall of the tube. In a particularly advantageous embodiment, the pipe further comprises electrical conductors (21, 22), disposed longitudinally on the wall of the pipe, said electrical conductors having a straight path (21) at the stiffened sections (11) of the pipe and a meandering path (22) at certain of the non-stiffened sections of the pipe (12), said meandering allowing the conductor to tolerate the possible twisting of the pipe when it is installed in the structure.

Description

Tuyauterie d'air "flex-rigide"  "Flex-rigid" air piping
L'invention se rapporte au domaine général du conditionnement d'air dans les aéronefs et concerne plus particulièrement la mise en place sur la structure de l'aéronef des tuyauteries destinée à la circulation de l'air. The invention relates to the general field of air conditioning in aircraft and relates more particularly to the placement on the aircraft structure of the pipes for the circulation of air.
L'invention se rapporte également aux problèmes de mise en place sur la structure d'un aéronef des différents torons constituant le câblage électrique.  The invention also relates to the problems of placing on the structure of an aircraft the different strands constituting the electrical wiring.
En ce qui concerne les aéronefs actuellement en service ou en cours d'assemblage, la mise en place des gaines de conditionnement d'air qui traversent l'aéronef ainsi que la mise en place des torons qui assurent les interconnexions électriques entre les différents équipements électriques dans l'aéronef constitue une étape délicate de l'assemblage d'un aéronef. For aircraft currently in service or in the course of assembly, the installation of the air conditioning ducts passing through the aircraft and the installation of the strands which ensure the electrical interconnections between the different electrical equipment. in the aircraft is a delicate step in the assembly of an aircraft.
La circulation d'air dans les aéronefs est généralement réalisée par des tuyauteries rigides en composite de fibres de verre et de résine phénolique, connectées entre elles par des manchons de raccordement.  The circulation of air in aircraft is generally performed by rigid pipes made of fiberglass and phenolic resin composite, connected together by connecting sleeves.
Pour des raisons évidentes de poids, ces tuyauteries sont de structure très légère, fragile, ce qui rend leur mise en place particulièrement délicate et coûteuse en temps d'installation. Par ailleurs leur fragilité intrinsèque les rend vulnérables et occasionne de fréquents remplacements, notamment au moment des opérations d'assemblage et de maintenance de l'aéronef.  For obvious reasons of weight, these pipes are very light structure, fragile, which makes their implementation particularly delicate and expensive in installation time. Moreover, their intrinsic fragility makes them vulnerable and causes frequent replacements, especially during assembly and maintenance operations of the aircraft.
Ces tuyauteries sont par ailleurs attachées à la structure par l'intermédiaire de supports fixés sur des éléments de structure (structure primaire, habillage...) la mise en place des supports (préparation de surface, collage/rivetage des supports, cycle de séchage....) étant elle-même consommatrice de temps.  These pipes are also attached to the structure by means of supports fixed on structural elements (primary structure, cladding ...) the placement of the supports (surface preparation, gluing / riveting of the supports, drying cycle ....) itself being time consuming.
L'interconnexion électrique entre équipements est, quant à elle, actuellement réalisée au moyen de câbles électriques. Ces câbles permettent par exemple la transmission de courants de forte intensité, de courants fonctionnels de plus faible intensité, ou de signaux électriques de communication, ainsi que la mise à la masse des différents équipements. Ces câbles sont également attachés à la structure par l'intermédiaire de supports fixés sur des éléments de structure (structure primaire, habillage...). The electrical interconnection between equipments is, for its part, currently carried out by means of electric cables. These cables allow for example the transmission of high intensity currents, functional currents of lower intensity, or electrical communication signals, as well as the grounding of the various equipment. These cables are also attached to the structure via supports fixed on structural elements (primary structure, cladding ...).
La mise en place de l'interconnexion est par ailleurs généralement réalisée en utilisant des torons de câbles pré-réalisés, de dimensions déterminées, difficilement reconfigurables.  The establishment of the interconnection is also generally carried out using pre-made cable strands, of determined dimensions, hardly reconfigurable.
Comme dans le cas des canalisations d'air, la mise en place des supports (préparation de surface, collage/rivetage des supports, cycle de séchage....) de l'interconnexion électrique est elle-même consommatrice de temps.  As in the case of air ducts, the placement of the supports (surface preparation, bonding / riveting of the supports, drying cycle, etc.) of the electrical interconnection is itself time consuming.
En outre l'espacement des supports fait que les liaisons électriques formant l'interconnexion offre de la laxité aux câblages, de sorte qu'une distance de ségrégation entre deux liaisons voisines est imposée par les règles d'installation des systèmes de façon à ce que deux liaisons électriques voisines ne puissent pas entrer en contact l'une de l'autre du fait de la laxité de ces liaisons entre deux attaches.  In addition, the spacing of the supports means that the electrical connections forming the interconnection offer laxity to the wiring, so that a segregation distance between two neighboring links is imposed by the installation rules of the systems so that two adjacent electrical connections can not come into contact with each other because of the laxity of these links between two fasteners.
Par suite, l'obligation de respecter des distances de ségrégation entre différents conducteurs fait que la mise en place d'une interconnexion conforme aux règles en vigueur en l'espèce, requiert un volume de déploiement important, difficilement compatible avec les architectures des aéronefs actuels, lesquels embarquent de plus en plus de systèmes dans des espaces techniques de plus en plus réduits.  Consequently, the obligation to respect distances of segregation between different drivers makes that the establishment of an interconnection in conformity with the rules in force in this case, requires a large volume of deployment, hardly compatible with the architectures of the current aircraft , which embark more and more systems in technical spaces increasingly reduced.
Ainsi la nécessité de raccourcir les temps d'installation des différents équipements lors de l'assemblage d'un aéronef et de rendre la mise en place des moyens de liaison électrique et de transport d'air compatible des contraintes de masse et d'encombrement fait naître le besoin de repenser en profondeur la structure de ces moyens. Thus the need to shorten the installation time of the various equipment during the assembly of an aircraft and to make the establishment of the means of electrical connection and air transport compatible mass and congestion constraints made the need to rethink in depth the structure of these means.
Un but de l'invention est de proposer une solution simple et efficace au problème exposé précédemment. An object of the invention is to provide a simple and effective solution to the problem described above.
A cet effet l'invention a pour objet un conduit pour former des canalisations de circulation d'air dans une structure. Le conduit selon l'invention comporte un tube flexible en matériau composite dont la matrice est une résine qui demeure souple après polymérisation. Ledit tube présente sur sa longueur des sections pour lesquelles la paroi du tube est rigidifiée au moyen d'éléments structuraux réalisés dans un matériau composite dont la matrice est une résine qui se rigidifie après polymérisation. Lesdits éléments structuraux sont configurés et agencés à la surface du tube de façon à former une ossature en treillis entourant la paroi du tube. For this purpose the invention relates to a duct for forming air circulation ducts in a structure. The conduit according to the invention comprises a flexible tube of composite material whose matrix is a resin which remains flexible after polymerization. Said tube has sections along its length for which the wall of the tube is stiffened by means of structural elements made of a composite material whose matrix is a resin which stiffens after polymerization. Said structural elements are configured and arranged to the surface of the tube so as to form a lattice framework surrounding the wall of the tube.
Selon différentes dispositions pouvant être combinées les unes aux autres le dispositif selon l'invention présente également diverses caractéristiques complémentaires. Ainsi:  According to different arrangements that can be combined with each other the device according to the invention also has various complementary features. So:
Selon une disposition particulière, la matrice formant le matériau composite constituant le tube est une résine polyuréthane ou une résine silicone.  According to a particular arrangement, the matrix forming the composite material constituting the tube is a polyurethane resin or a silicone resin.
Selon une disposition particulière, la matrice formant le matériau composite constituant les éléments structuraux est une résine acrylique.  According to one particular arrangement, the matrix forming the composite material constituting the structural elements is an acrylic resin.
Selon une disposition particulière, l'ossature en treillis en matériau composite rigide constituant les sections rigides du conduit est formée d'anneaux reliés les uns aux autres par des longerons disposés tout autour de la paroi du tube.  According to a particular arrangement, the lattice framework of rigid composite material constituting the rigid sections of the duct is formed of rings connected to each other by longitudinal members arranged all around the wall of the tube.
Selon une disposition particulière, le conduit selon l'invention comporte en outre des éléments structuraux en forme d'anneaux, en matériau composite rigide, disposés aux extrémités du conduit.  According to a particular arrangement, the duct according to the invention further comprises ring-shaped structural elements of rigid composite material disposed at the ends of the duct.
Selon une disposition particulière, l'ossature en treillis et les éléments structuraux des extrémités sont intégrés à la paroi du tube flexible avant polymérisation des résines constituant le tube flexible et les éléments formant l'ossature.  According to a particular arrangement, the lattice framework and the structural elements of the ends are integrated into the wall of the flexible tube before polymerization of the resins constituting the flexible tube and the elements forming the framework.
Selon une disposition particulière, les éléments de renfort sont intégrés au conduit avant polymérisation des résines.  According to a particular arrangement, the reinforcing elements are integrated in the pipe before polymerization of the resins.
Selon une disposition particulière, le conduit selon l'invention comporte en outre des conducteurs électriques disposés longitudinalement sur la paroi du conduit, lesdits conducteurs électriques présentant un parcours rectiligne au niveau des sections rigidifiées du conduit et un parcours présentant des sinuosités au niveau de certaines des sections du conduit non rigidifiées.  According to one particular arrangement, the conduit according to the invention further comprises electrical conductors arranged longitudinally on the wall of the conduit, said electrical conductors having a rectilinear path at the level of the rigidified sections of the conduit and a path having sinuosities at some of the non-rigidified sections of the duct.
Selon une disposition particulière, lesdits conducteurs électriques présentent un parcours présentant des sinuosités au niveau des sections du conduit non rigidifiées situées aux extrémités dudit conduit.  According to a particular arrangement, said electrical conductors have a path having sinuosities at non-rigidified sections of the duct located at the ends of said duct.
Selon une disposition particulière, lesdits conducteurs électriques sont intégrés à la paroi du conduit avant polymérisation des résines.  According to a particular arrangement, said electrical conductors are integrated in the wall of the conduit before polymerization of the resins.
Selon une disposition particulière, lesdits conducteurs électriques sont fixés à la paroi du conduit au moyen d'un adhésif. L'invention permet avantageusement la réalisation de longues tuyauteries, comportant des parties rigides pouvant être rapidement mises en place et fixées à la structure et des parties souples permettant une installation et un démontage plus aisés. According to a particular arrangement, said electrical conductors are attached to the wall of the conduit by means of an adhesive. The invention advantageously allows the realization of long pipes, with rigid parts that can be quickly set up and fixed to the structure and flexible parts for easier installation and disassembly.
Par ailleurs la possibilité de réaliser d'un seul tenant des canalisations de grandes longueurs pouvant porter des liaisons électriques permet avantageusement de réaliser des liaisons électriques de grandes longueurs présentant un minimum de zones de connexion. Ces zones sont de nature à pénaliser le comportement fonctionnel des systèmes électriques par ajout de résistances de contact et baisse de la fiabilité de la liaison dans son ensemble.  Furthermore, the possibility of producing in one piece pipes of great lengths that can carry electrical connections advantageously makes it possible to make electrical connections of great lengths having a minimum of connection zones. These zones are likely to penalize the functional behavior of the electrical systems by adding contact resistances and decrease the reliability of the link as a whole.
Les caractéristiques et avantages de l'invention seront mieux appréciés grâce à la description qui suit, description qui s'appuie sur les figures annexées qui présentent: The characteristics and advantages of the invention will be better appreciated thanks to the following description, which is based on the appended figures which show:
- la figure 1 , une vue schématique globale présentant la structure d'un conduit selon l'invention ; - Figure 1, a schematic overall view showing the structure of a conduit according to the invention;
- la figure 2, une vue schématique globale d'un conduit selon l'invention équipé d'éléments conducteurs;  - Figure 2, a schematic overall view of a conduit according to the invention equipped with conductive elements;
- la figure 3, une vue schématique partielle du conduit selon l'invention présenté sur la figure 3;  - Figure 3, a partial schematic view of the conduit according to the invention shown in Figure 3;
- la figure 4, une vue schématique partielle du conduit selon l'invention présenté sur la figure 3, l'extrémité de l'élément de conduit étant pliée;  - Figure 4, a partial schematic view of the duct according to the invention shown in Figure 3, the end of the duct element being folded;
- la figure 5, une vue schématique partielle d'un conduit 10a selon l'invention présenté sur la figure 3, ladite extrémité étant raccordée à un autre conduit 10b.  - Figure 5, a partial schematic view of a conduit 10a according to the invention shown in Figure 3, said end being connected to another conduit 10b.
La suite de la description présente l'invention au travers d'un exemple de réalisation illustré par les figures 1 à 5 associées. Cet exemple qui a simplement pour objet de mettre en évidences les caractéristiques de l'invention, n'est bien entendu nullement limitatif de la portée ou de l'étendue de cette dernière. The following description presents the invention through an exemplary embodiment illustrated by Figures 1 to 5 associated. This example, which simply aims to highlight the characteristics of the invention, is of course in no way limiting the scope or extent of the latter.
Comme l'illustre la figure 1 , le dispositif selon l'invention consiste principalement en un conduit 10, un conduit de conditionnement d'air destiné à être logé dans une structure d'aéronef par exemple, présentant une alternance de sections de conduit rigides 1 1 séparées les unes des autres par des sections de conduit souples 12. As illustrated in FIG. 1, the device according to the invention consists mainly of a duct 10, an air conditioning duct intended to being housed in an aircraft structure for example, having an alternation of rigid duct sections 1 1 separated from each other by flexible duct sections 12.
Les longueurs respectives des sections rigides 1 1 et souples 12 dépendent essentiellement de l'usage du conduit considéré et des conditions de mise en place de ce conduit.  The respective lengths of the rigid sections 1 1 and flexible 12 essentially depend on the use of the conduit and the conditions of installation of this conduit.
Selon l'invention, cette structure dite "Flex-rigide" est obtenue en réalisant un conduit en matériau composite formé d'un tissu de renfort imprégné d'une résine ayant la propriété de rester souple après polymérisation. According to the invention, this "flex-rigid" structure is obtained by producing a composite material duct formed of a reinforcement fabric impregnated with a resin having the property of remaining flexible after polymerization.
Dans un mode de réalisation particulier pris comme exemple non limitatif, la résine utilisée est une résine polyuréthane.  In a particular embodiment taken as non-limiting example, the resin used is a polyurethane resin.
Le conduit souple 10 ainsi obtenu est par ailleurs rigidifié sur certaines sections par des élément structuraux 13, chaque élément étant constitué d'anneaux 131 a et 131 b en matériau composites à matrice rigide, disposés le long du conduit 10 et reliés entre eux par des longerons 132, réalisés en matériau composite à matrice rigide également, et disposés tout autour de la paroi du conduit 10, de manière de préférence régulière. The flexible duct 10 thus obtained is, moreover, stiffened on certain sections by structural elements 13, each element consisting of rings 131a and 131b made of composite materials with a rigid matrix, arranged along the duct 10 and connected to one another by means of longitudinal members 132, made of rigid matrix composite material as well, and arranged all around the wall of the duct 10, preferably evenly.
L'ensemble constitué par les anneaux 131 a et 131 b reliés les uns aux autres par des longerons 132 forme une ossature 13 ayant l'aspect d'un cadre ou d'un treillis entourant certains tronçons du conduit 10, la partie centrale notamment, et rendant ces tronçons incapables de flexion.  The assembly constituted by the rings 131a and 131b connected to each other by longitudinal members 132 forms a frame 13 having the appearance of a frame or a lattice surrounding certain sections of the duct 10, the central part in particular, and making these sections incapable of bending.
Le conduit 10 selon l'invention peut ainsi être constitué d'une succession de parties rigides 13 et de parties souples 12 telles que celles illustrées par la figure 1 .  The conduit 10 according to the invention may thus consist of a succession of rigid parts 13 and flexible parts 12 such as those illustrated in FIG.
Le conduit 10 ainsi obtenu est également rigidifié à ses extrémités par des éléments terminaux 14, 15 en forme d'anneaux réalisés en matériau composite à matrice rigide, semblable aux anneaux 131 a et 131 b constituant la structure rigide 13. Ces anneaux, de largeurs déterminées, ont pour fonction de faciliter le raccordement de deux conduits, en permettant par exemple d'insérer facilement un tube de raccord rigide 31 à l'extrémité de chacun des conduits comme illustré par la figure 3. The duct 10 thus obtained is also stiffened at its ends by end elements 14, 15 in the form of rings made of rigid matrix composite material, similar to the rings 131a and 131b constituting the rigid structure 13. These rings, widths determined, have the function of facilitating the connection of two ducts, allowing for example to easily insert a rigid connecting tube 31 at the end of each of the ducts as shown in Figure 3.
Selon que la section terminale du conduit considéré est maintenue souple ou rigidifiée, un anneau d'extrémité peut être placé à l'extrémité d'une section du conduit 10 maintenue souple, comme illustré sur les figures 1 à 3, ou constituer l'anneau d'extrémité 131 b d'une section rigide. De manière optionnelle, le conduit 10 peut également comporter des structures intermédiaires 14 et 15 en forme d'anneaux réalisées en matériau composite à matrice rigide, semblables aux anneaux 131 a et 131 b constituant la structure rigide 13 mais sans lien rigide entre elles ou avec cette dernière. Ces anneaux rigides intermédiaires 14 et 15 peuvent notamment faciliter la liaison entre deux conduits présentant des terminaisons souples de sections de conduit maintenues souples. Le conduit de structure "Flex-rigide" selon l'invention peut être réalisé en matériau composite de différentes façons connues et non exposées ici. Depending on whether the end section of the duct under consideration is kept supple or stiffened, an end ring may be placed at the end of a section of duct 10 that is kept flexible, as illustrated in FIGS. 1 to 3, or constitute the ring. end 131b of a rigid section. Optionally, the duct 10 may also comprise intermediate structures 14 and 15 in the form of rings made of rigid matrix composite material, similar to the rings 131a and 131b constituting the rigid structure 13 but without a rigid connection between them or with the latter. These rigid intermediate rings 14 and 15 may in particular facilitate the connection between two ducts having flexible endings of duct sections held flexible. The structure duct "Flex-rigid" according to the invention can be made of composite material in various ways known and not shown here.
Pour la fabrication de conduits "flex-rigides", on peut par exemple utiliser un tissu en fibre de verre tissé en grosses mailles et une résine restant souple après polymérisation (polyuréthane, silicone...) pour les parties flexibles, et un tissu de verre standard avec une résine rigide après polymérisation, une résine époxy par exemple.  For the manufacture of "flex-rigid" ducts, it is possible for example to use a fiberglass fabric woven in large mesh and a resin remaining flexible after polymerization (polyurethane, silicone, etc.) for the flexible parts, and a fabric of standard glass with a rigid resin after polymerization, an epoxy resin for example.
Cependant dans une forme de réalisation préférée, le conduit 10 selon l'invention est réalisé en une seule opération qui consiste à former un tube à partir d'un tissus en fibre de verre imprégné d'une résine élastique et à constituer l'ossature rigide sur la paroi externe du tube ainsi formé en appliquant à la surface externe du tube des bandes de tissus imprégnées d'une matrice rigide, les bandes de tissu imprégnées étant agencées pour constituer les anneaux 131 a et 131 b et les longerons 132 formant un élément d'ossature 13 ou les anneaux d'extrémité 14 et 15 du conduit.  However, in a preferred embodiment, the conduit 10 according to the invention is made in a single operation which consists in forming a tube from a fiberglass fabric impregnated with an elastic resin and constituting the rigid framework. on the outer wall of the tube thus formed by applying to the outer surface of the tube strips of fabric impregnated with a rigid matrix, the impregnated fabric strips being arranged to form the rings 131a and 131b and the longitudinal members 132 forming an element frame 13 or the end rings 14 and 15 of the conduit.
L'ensemble ainsi constitué est alors polymérisé en une seule opération, de sorte que le conduit 10 obtenu forme un objet monolithique, c'est-à-dire sans élément rapporté après fabrication, par collage ou toute autre technique connue.  The assembly thus formed is then polymerized in a single operation, so that the resulting conduit 10 forms a monolithic object, that is to say without added element after manufacture, by gluing or any other known technique.
Selon cette forme de réalisation préférée, la résine époxy utilisée pour former les éléments d'ossature 13 est choisie de façon à ce que sa polymérisation se produise dans les mêmes conditions que celles du polyuréthane utilisé pour réaliser le conduit 10.  According to this preferred embodiment, the epoxy resin used to form the framework elements 13 is chosen so that its polymerization occurs under the same conditions as those of the polyurethane used to produce the conduit 10.
Avantageusement, comme l'illustrent les figures 4 et 5, cette structure "Flex-rigide" permet de disposer d'un conduit unique qui présente des sections rectilignes rigides 1 1 et des sections souples 12, capables de se déformer sans dommage, permettant de réaliser d'une pièce des conduits 10 de grande longueur (de plusieurs mètres) faciles à mettre en place à l'intérieur de la structure à laquelle il sont destinés. Les parties rigides 1 1 permettent une manipulation aisée du conduit 10 considéré, l'installation dudit conduit sur la structure et le raccordement facile de différents conduits formant une canalisation. Advantageously, as illustrated in FIGS. 4 and 5, this "flex-rigid" structure makes it possible to have a single duct which has rigid rectilinear sections 1 1 and flexible sections 12, capable of deforming without damage, making it possible to make a piece of ducts 10 of great length (several meters) easy to set up inside the structure for which it is intended. The rigid parts 1 1 allow easy handling of the conduit 10 considered, the installation of said conduit on the structure and the easy connection of different ducts forming a pipe.
Les parties flexibles 12, quant à elles, facilitent le montage et le démontage de conduites dans des environnements encombrés et la reprise des variations géométriques d'assemblage des structures sur lesquelles elles sont installées. Elles permettent notamment au conduit 10 considéré de présenter des coudes pour suivre le cheminement voulu. Les coudes sont ainsi réalisés sans nécessiter l'interruption du conduit ni la mise en place d'un élément rigide coudé. On peut ainsi réaliser, avec un minimum de jonctions 31 , des canalisations de grandes longueurs présentant à la fois des portions rectilignes et des portions coudées.  The flexible portions 12, in turn, facilitate the assembly and disassembly of pipes in congested environments and the recovery of assembly geometric variations of the structures on which they are installed. They allow in particular the conduit 10 considered to have bends to follow the desired path. The elbows are thus made without requiring the interruption of the conduit or the introduction of a rigid element bent. It is thus possible to achieve, with a minimum of junctions 31, long length pipes having both rectilinear portions and bent portions.
Dans une forme de réalisation particulière, illustrée par les figures 2 à 5, le conduit 10 selon l'invention peut être équipé de conducteurs électriques 21 (câbles, tresses...) disposés de façon à courir longitudinalement le long du conduit 10. A cet effet, lesdits conducteurs 21 peuvent être directement collés sur la surface du conduit 10 après fabrication de ce dernier. In a particular embodiment, illustrated in FIGS. 2 to 5, the duct 10 according to the invention may be equipped with electrical conductors 21 (cables, braids, etc.) arranged so as to run longitudinally along the duct 10. this effect, said conductors 21 can be directly bonded to the surface of the conduit 10 after manufacture of the latter.
Alternativement, ils peuvent être intégrés, avant polymérisation, dans la matrice imprégnant le matériau composite de sorte qu'après polymérisation ils font partie intégrante de la paroi du conduit 10. Les conducteurs 21 sont préférentiellement disposés de façon à passer sur les longerons 132 constituant chacune des ossatures 13 formant les sections rigides 1 1 du conduit 10.  Alternatively, they can be integrated, before polymerization, in the matrix impregnating the composite material so that after polymerization they are an integral part of the wall of the conduit 10. The conductors 21 are preferably arranged to pass on the longitudinal members 132 constituting each frames 13 forming the rigid sections 1 1 of the duct 10.
Selon l'invention, les conducteurs 21 sont agencés sur le conduit 10 de façon à ne pas entraver la capacité de déformation dont dispose le conduit 10 au niveau des sections 12 maintenues souples. A cet effet, ils adoptent dans ces zones un parcours ondulé 22, comme illustré sur les figures 2 et 3. Ce parcours ondulé rend avantageusement possible une déformation du profil rectiligne du conduit 10 au niveau des sections flexibles 12, comme illustré par les figures 4 et 5, sans que les conducteurs 21 se rompent ou qu'ils s'arrachent de la surface du conduit 10 endommageant par là même la paroi de ce dernier. On peut ainsi avantageusement relier deux conduits 10a et 10b orientés suivant des directions différentes, comme illustré par la figure 5, au moyen d'un simple manchon de raccordement rectiligne 31 . II est à noter que du fait du plus faible nombre de jonctions nécessaires pour former une canalisation de longueur donnée, le cheminement de liaisons électriques le long de la canalisation considérée nécessite un nombre plus faible de dispositifs de connexions 51 de sorte que les pertes électriques (par effet joule lié à la résistance électrique notamment) engendrées par les connexions sont plus faibles et que les risques de rupture de ces liaisons électriques par interruption de ces connexions sont moindres. L'utilisation de conduits "Flex-rigides" selon l'invention procure ainsi plusieurs avantages: According to the invention, the conductors 21 are arranged on the conduit 10 so as not to hinder the deformation capacity available to the conduit 10 at the level of the sections 12 held flexible. For this purpose, they adopt in these zones a corrugated course 22, as illustrated in FIGS. 2 and 3. This corrugated course advantageously makes it possible to deform the rectilinear profile of the duct 10 at the level of the flexible sections 12, as illustrated by FIGS. and 5, without the conductors 21 breaking or tearing from the surface of the duct 10 thereby damaging the wall of the latter. It is thus possible to advantageously connect two ducts 10a and 10b oriented in different directions, as illustrated in FIG. 5, by means of a simple rectilinear connection sleeve 31. It should be noted that because of the smaller number of junctions necessary to form a pipe of given length, the path of electrical connections along the pipe considered requires a smaller number of connection devices 51 so that the electrical losses ( by joule effect related to the electrical resistance) caused by the connections are weaker and that the risks of breaking these electrical connections by interruption of these connections are less. The use of "Flex-rigid" ducts according to the invention thus provides several advantages:
- Elle permet l'installation groupée des conduites d'air et de réseaux électriques, ce qui entraine une diminution de la charge de travail des opérateurs chargés de l'installation de ces équipements et du temps de cycle nécessaire pour l'installation des systèmes électriques (suppression de la mise en place des supports des liaisons électriques).  - It allows the group installation of air ducts and electrical networks, which leads to a reduction in the workload of the operators responsible for the installation of these equipment and the cycle time required for the installation of electrical systems (removal of the installation of the supports of the electrical connections).
- Elle rend possible un accroissement de la compacité des liaisons électriques, les éléments conducteurs étant directement intégrés à la surface des canalisations d'air (pas de distances de ségrégation à respecter) ;  It makes it possible to increase the compactness of the electrical connections, the conductive elements being directly integrated into the surface of the air ducts (no segregation distances to be respected);
- Elle induit une réduction de la masse des liaisons électriques par la suppression des supports nécessaires à son maintien dans l'aéronef ;  It induces a reduction of the mass of the electrical connections by the suppression of the supports necessary for its maintenance in the aircraft;
- elle introduit une certaine tolérance aux dommages des conduites d'air qui peuvent maintenant se déformer en cas d'impact, lié à une chute d'outil par exemple, au lieu de se détériorer. La flexibilité des conduits "Flex-rigides" rendant ces derniers plus robustes, leur utilisation entraine donc avantageusement une réduction des coûts de maintenance.  - It introduces a certain tolerance to the damage of the air ducts which can now deform in case of impact, related to a tool fall for example, instead of deteriorating. The flexibility of the "Flex-rigid" ducts makes them more robust, and their use therefore advantageously leads to a reduction in maintenance costs.

Claims

REVENDICATIONS
1 . Conduit pour former des canalisations de circulation d'air dans une structure, caractérisé en ce qu'il comporte un tube flexible (10) en matériau composite dont la matrice est une résine qui demeure souple après polymérisation ledit tube présentant sur sa longueur des sections (1 1 ) pour lesquelles la paroi du tube est rigidifiée au moyen d'éléments structuraux (13) réalisés dans un matériau composite dont la matrice est une résine qui se rigidifie après polymérisation, lesdits éléments structuraux (13) étant configurés et agencés à la surface du tube de façon à former une ossature en treillis entourant la paroi du tube (10). 1. Conduit for forming air circulation ducts in a structure, characterized in that it comprises a flexible tube (10) made of composite material whose matrix is a resin which remains flexible after polymerization, said tube having sections along its length ( 1 1) for which the wall of the tube is stiffened by means of structural elements (13) made of a composite material whose matrix is a resin which is stiffened after polymerization, said structural elements (13) being configured and arranged on the surface of the tube so as to form a lattice framework surrounding the wall of the tube (10).
2. Dispositif selon la revendication 1 , caractérisé en ce que la matrice formant le matériau composite constituant le tube (10) est une résine polyuréthane ou une résine silicone. 2. Device according to claim 1, characterized in that the matrix forming the composite material constituting the tube (10) is a polyurethane resin or a silicone resin.
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que la matrice formant le matériau composite constituant les éléments structuraux (13) est une résine acrylique. 3. Device according to one of claims 1 or 2, characterized in that the matrix forming the composite material constituting the structural elements (13) is an acrylic resin.
4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'ossature (13) en treillis en matériau composite rigide constituant les sections rigides du conduit est formée d'anneaux reliés les uns aux autres par des longerons disposés tout autour de la paroi du tube (10). 4. Device according to any one of claims 1 to 3, characterized in that the frame (13) lattice of rigid composite material constituting the rigid sections of the duct is formed of rings connected to each other by longitudinal members arranged around the wall of the tube (10).
5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre des éléments structuraux en forme d'anneaux (14, 15), en matériau composite rigide, disposés aux extrémités du conduit. 5. Device according to any one of the preceding claims, characterized in that it further comprises structural elements in the form of rings (14, 15), of rigid composite material, arranged at the ends of the conduit.
6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'ossature en treillis (13) et les éléments structuraux des extrémités (14, 15) sont intégrés à la paroi du tube (10) flexible avant polymérisation des résines constituant le tube flexible et les éléments formant l'ossature. 6. Device according to any one of claims 1 to 5, characterized in that the lattice framework (13) and the structural elements of the ends (14, 15) are integrated in the wall of the tube (10) flexible before polymerization of the resins constituting the flexible tube and the elements forming the framework.
7. Dispositifs selon la revendication 6, caractérisé en ce que les éléments de renfort (13, 14, 15) sont intégrés au conduit avant polymérisation des résines. 7. Devices according to claim 6, characterized in that the reinforcing elements (13, 14, 15) are integrated in the conduit before polymerization of the resins.
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre des conducteurs électriques (21 , 22) disposés longitudinalement sur la paroi du conduit, lesdits conducteurs électriques présentant un parcours rectiligne (21 ) au niveau des sections rigidifiées (1 1 ) du conduit et un parcours présentant des sinuosités (22) au niveau de certaines des sections du conduit non rigidifiées (12). 8. Device according to any one of the preceding claims, characterized in that it further comprises electrical conductors (21, 22) arranged longitudinally on the wall of the conduit, said electrical conductors having a rectilinear path (21) at the level of stiffened sections (1 1) of the conduit and a path having sinuosities (22) at some of the non-rigidified conduit sections (12).
9. Dispositif selon la revendication 8, caractérisé en ce que lesdits conducteurs électriques présentent un parcours présentant des sinuosités (22) au niveau des sections du conduit non rigidifiées (12) situées aux extrémités dudit conduit. 9. Device according to claim 8, characterized in that said electrical conductors have a path having sinuosities (22) at the non-rigidified sections of the duct (12) at the ends of said duct.
10. Dispositif selon l'une quelconque des revendications 8 ou 9, caractérisé en ce que lesdits conducteurs électriques (21 , 22) sont intégrés à la paroi du conduit avant polymérisation des résines. 10. Device according to any one of claims 8 or 9, characterized in that said electrical conductors (21, 22) are integrated in the wall of the conduit before polymerization of the resins.
1 1 . Dispositif selon l'une quelconque des revendications 8 ou 9, caractérisé en ce que lesdits conducteurs électriques (21 , 22) sont fixés à la paroi du conduit au moyen d'un adhésif. 1 1. Device according to any one of claims 8 or 9, characterized in that said electrical conductors (21, 22) are attached to the wall of the conduit by means of an adhesive.
PCT/EP2015/077064 2014-11-21 2015-11-19 "flexible-rigid" air pipe WO2016079226A1 (en)

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CN201580071731.8A CN107208829B (en) 2014-11-21 2015-11-19 " soft-rigidity " air pipeline
US15/528,185 US10203051B2 (en) 2014-11-21 2015-11-19 “Flexible-rigid” air pipe
EP15798038.4A EP3221624B1 (en) 2014-11-21 2015-11-19 "flexible-rigid" air pipe

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FR1461288A FR3028914B1 (en) 2014-11-21 2014-11-21 "FLEX-RIGID" AIR PIPING
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EP3221624B1 (en) 2019-01-09
EP3221624A1 (en) 2017-09-27
CN107208829B (en) 2019-05-17
US10203051B2 (en) 2019-02-12
FR3028914B1 (en) 2017-01-06
CN107208829A (en) 2017-09-26
FR3028914A1 (en) 2016-05-27

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